The Edelbrock #91172 Weld-In Oxygen Sensor Bung is for All Edelbrock Pro-Flo EFI Systems, E-Street EFI, QwikData 2, or any application requiring an Oxygen Sensor installed in the Exhaust system. This part is machined from steel stock with an 18 x 1.5mm in
Product Features:- 18 x 1.5 mm Thread Pitch
- Steel Material
- Bung O2 Sensor Weld In
- Sold Individually
- Made In The USA